How Magnesium, Zinc, and Copper Affect Sleep Quality: Research Results

A study conducted among more than a thousand adults revealed a connection between sleep quality and levels of certain trace elements in the body. The Pittsburgh Sleep Quality Index (PSQI) was used to assess sleep quality, while concentrations of magnesium, zinc, and copper were determined based on blood tests and dietary data. The results were published in the journal Nutrients.

The most significant impact on sleep quality was attributed to magnesium. Individuals with poor sleep exhibited lower levels of magnesium in their blood and a deficiency of this element in their diet. This association remained significant even when accounting for factors such as age, gender, and body mass index, which may indicate an independent role of magnesium in the sleep regulation process.

Zinc demonstrated a somewhat different situation: higher levels of this trace element in serum were associated with a lower likelihood of sleep problems, while a deficiency of zinc significantly increased the risk of sleep disturbances. At the same time, the amount of zinc in the diet showed no correlation with sleep quality.

As for copper, it did not show any connection with sleep quality, both in terms of blood test results and dietary data. The researchers note that this study is cross-sectional and reveals only statistical associations; therefore, further long-term and interventional studies are needed to confirm causal relationships.